نتایج جستجو برای: bromus spp
تعداد نتایج: 52291 فیلتر نتایج به سال:
A draft genome for Corynebacterium afermentans LCDC 88-0199(T) was investigated. The size of the genome was 2,345,615 bp with an observed G+C content of 64.85%. Annotation revealed 2 rRNA sequences, 54 tRNA genes, and 2,164 coding sequences. Genome coverage was 85× and consisted of 24 contigs with an N50 of 187,988 bp.
Weeds are a major problem in seeding rangeland and cropland to native grasses. However, many immature weedy forbs and grasses are palatable to cattle. Research was conducted using yearling cattle for weed control in big bluestem (Andropogon gerardii var. gerardii Vitman) seedings (1987, 1988) at Mead, Nebraska on a Sharpsburg silty clay loam (fine, montmorillonitic, mesic Typic Argiudoll) soil....
Seed production of annual weeds persisting through cropping phases replenishes/establishes viable seed banks from which these weeds will continue to interfere with crop production. Harvest weed seed control (HWSC) systems are now viewed as an effective means of interrupting this process by targeting mature weed seed, preventing seed bank inputs. However, the efficacy of these systems is directl...
abstract for evaluation and identification some of the chamomile species in two genera anthemis and matricaria, morphological and phonological characteristics were used. the experiment was conducted in a randomized completely blocks design (rcbd) with three replicates, sixteen quantitative and qualitative traits were evaluated such as plant height, anthodium diameter, receptacle diameter, ligul...
Silvicultural operation need to notice the plant species diversity in forest. To this study Gomarlang district in marivan region, northern zagros forest was selected. Selected 100 ha area because have similar physiography condition (north aspect and 1650 to 1800 m s.a.l. In study area 100 micro plots of 5m by 5 m (25 m2) including the species and the numbers of this species randomize...
Presence of annual bromes (Bromus spp.), introduced annual weedy grasses, can alter seasonal patterns of forage production and quality and require management changes for efficient use of infested rangelands. We determined biological impacts of the presence of brome by comparing livestock performance on brome infested rangeland to similar sites on which brome had been suppressed by autumn applic...
This research compared effects of the weed control practice, soil cultivation, and the conventional practice, glyphosate application on weed seedbank, in a vineyard system. The experiment was conducted in a commercial wine-grape vineyard in the Napa Valley of northern California from 2003 to 2005. The annual treatments were ‘‘winter–spring glyphosate,’’ ‘‘spring cultivation,’’ ‘‘fall–spring cul...
گراس ها تک لپه ای هایی هستند که بیش از 50 قبیله، 650 جنس و 10000 گونه را شامل می شوندکه جنس های ربروموس و لولیوم از مهم ترین آن ها به شمار می روند. این ذخیره ژنتیکی غنی، پتانسیل بالایی برای اصلاح گران جهت استفاده در برنامه های به نژادی را فراهم کرده است. لازمه استفاده از این ماده ژنتیکی خام شناخت کامل و دقیق آن است. تحقیق حاضر با هدف مطالعه سیتوژنتیکی ژنوتیپ های جنس های bromus وlolium صورت گرفت...
In recent decade, establish and maintenance of turf grasses is faced with serious doubts due to reduction of precipitation and water resources. So, identification of drought-resistant native and rangeland species, and introducing them as turf grass not only is effective in reducing water consumption, but also help to preserve the genetic resources of the country. In order to evaluate the usabil...
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